850719919 has 16 divisors (see below), whose sum is σ = 993467200. Its totient is φ = 728482608.

The previous prime is 850719917. The next prime is 850720007. The reversal of 850719919 is 919917058.

It is a happy number.

It is not a de Polignac number, because 850719919 - 2¹ = 850719917 is a prime.

It is a super-2 number, since 2×850719919² = 1447448761166733122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850719917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 823027 + ... + 824059.

It is an arithmetic number, because the mean of its divisors is an integer number (62091700).

Almost surely, 2^850719919 is an apocalyptic number.

850719919 is a deficient number, since it is larger than the sum of its proper divisors (142747281).

850719919 is an frugal number, since it uses more digits than its factorization.

850719919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082 (or 1040 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 49.

The square root of 850719919 is about 29167.1033700640. The cubic root of 850719919 is about 947.5355956023.

The spelling of 850719919 in words is "eight hundred fifty million, seven hundred nineteen thousand, nine hundred nineteen".